Kansas Agricultural Experiment Station Research Reports
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1 Kansas Agricultural Experiment Station Research Reports Volume 0 Issue 0 Swine Day (968-04) Article 0 Effects of non-starch polysaccharide enzymes ( GG and/or Ronozyme VP) on growth performance of nursery pigs fed normal or drought-stressed corn Cassandra K. Jones E L. Franz Hyatt L. Frobose Joel M. DeRouchey See next page for additional authors Follow this and additional works at: Part of the Other Animal Sciences Commons Recommended Citation Jones, Cassandra K.; Franz, E L.; Frobose, Hyatt L.; DeRouchey, Joel M.; Goodband, Robert D.; Tokach, Michael D.; and Bergstrom, J R. (0) "Effects of non-starch polysaccharide enzymes ( GG and/or Ronozyme VP) on growth performance of nursery pigs fed normal or drought-stressed corn," Kansas Agricultural Experiment Station Research Reports: Vol. 0: Iss / This report is brought to you for free and open access by New Prairie Press. It has been accepted for inclusion in Kansas Agricultural Experiment Station Research Reports by an authorized administrator of New Prairie Press. Copyright 0 Kansas State University Agricultural Experiment Station and Cooperative Extension Service. Contents of this publication may be freely reproduced for educational purposes. All other rights reserved. Brand names appearing in this publication are for product identification purposes only. K-State Research and Extension is an equal opportunity provider and employer.
2 Effects of non-starch polysaccharide enzymes ( GG and/or Ronozyme VP) on growth performance of nursery pigs fed normal or drought-stressed corn Abstract A total of 60 barrows (PIC 050 à 7, initially.9 lb BW) were used to determine the effects of nonstarch polysaccharide enzymes ( GG and/or Ronozyme VP; DSM Nutritional Products, Inc., Parsippany, NJ) on growth performance and nutrient digestibility of nursery pigs fed normal or droughtstressed corn. Initially, corn samples were collected from 4 separate lots and analyzed to find representatives of normal and drought-stressed corn. These same lots were also used in a separate experiment measuring the impact of drought stress on diet manufacturing characteristics. The lot selected to represent the normal corn had a test weight of 55.9 lb/bu, <5 ppb>aflatoxin, 5.0% moisture, and contained 0.77% β-glucan. The lot selected to represent drought-stressed corn had a test weight of 54. lb/bu, 6 ppb aflatoxin, 4.% moisture, and 0.8% β-glucan. Pigs were allotted to pens at weaning (d 0) and were acclimated to a common diet for 0 d prior to the start of this experiment. On d 0 post-placement, pigs were weighed and pens of pigs randomly allotted to of 8 dietary treatments in a completely randomized design. Treatments were arranged in a à 4 factorial with main effects of corn (normal vs. drought-stressed) and enzyme inclusion (none vs. 00 ppm GG vs. 50 ppm Ronozyme VP vs. 00 ppm GG + 50 ppm Ronozyme VP). Pigs were fed experimental treatments from d 0 to 5 postweaning in two phases. Feed and fecal samples were collected on d 0 postweaning and analyzed to determine apparent total tract digestibility of nutrients. The nutrient concentrations of normal and drought-stressed corn were similar, which resulted in few treatment or main effects differences of corn type or enzyme inclusion. No interactions were observed (P > 0.4) between corn source and enzyme inclusion. Overall (d 0 to 5), there was no effect on ADG or ADFI, but enzyme inclusion tended to improve (P = 0.09) F/G, which was primarily driven by the improved (P = 0.04) feed efficiency of pigs fed GG in Phase (d 0 to 5 postweaning). In conclusion, drought stress did not alter the non-starch polysaccharide concentration of corn. Because non-starch polysaccharide substrates were similar across treatments, it was not surprising that enzyme inclusion showed little benefit to nursery pig growth performance; however, improved feed efficiency of pigs fed diets containing GG from d 0 to 5 postweaning warrants further investigation.; Swine Day, Manhattan, KS, November, 0 Keywords Swine day, 0; Kansas Agricultural Experiment Station contribution; no S; Report of progress (Kansas State University. Agricultural Experiment Station and Cooperative Extension Service); 09; Nonstarch polysaccharide enzymes; Nutrient digestibility; Nursery pig; Corn; Drought-stressed corn Creative Commons License This work is licensed under a Creative Commons Attribution 4.0 License. Authors Cassandra K. Jones, E L. Franz, Hyatt L. Frobose, Joel M. DeRouchey, Robert D. Goodband, Michael D. Tokach, and J R. Bergstrom This Research Report article is available in Kansas Agricultural Experiment Station Research Reports: kaesrr/vol0/iss0/
3 Effects of Non-Starch Polysaccharide Enzymes ( GG and/or Ronozyme VP) on Growth Performance of Nursery Pigs Fed Normal or Drought-Stressed Corn C.K. Jones, E.L. Franz, H.L. Frobose, J.M DeRouchey, R.D. Goodband, M.D. Tokach, and J.R. Bergstrom Summary A total of 60 barrows (PIC 050 7, initially.9 lb BW) were used to determine the effects of non-starch polysaccharide enzymes ( GG and/or Ronozyme VP; DSM Nutritional Products, Inc., Parsippany, NJ) on growth performance and nutrient digestibility of nursery pigs fed normal or drought-stressed corn. Initially, corn samples were collected from 4 separate lots and analyzed to find representatives of normal and drought-stressed corn. These same lots were also used in a separate experiment measuring the impact of drought stress on diet manufacturing characteristics. The lot selected to represent the normal corn had a test weight of 55.9 lb/bu, <5 ppb aflatoxin, 5.0% moisture, and contained 0.77% β-glucan. The lot selected to represent drought-stressed corn had a test weight of 54. lb/bu, 6 ppb aflatoxin, 4.% moisture, and 0.8% β-glucan. Pigs were allotted to pens at weaning (d 0) and were acclimated to a common diet for 0 d prior to the start of this experiment. On d 0 post-placement, pigs were weighed and pens of pigs randomly allotted to of 8 dietary treatments in a completely randomized design. Treatments were arranged in a 4 factorial with main effects of corn (normal vs. drought-stressed) and enzyme inclusion (none vs. 00 ppm GG vs. 50 ppm Ronozyme VP vs. 00 ppm GG + 50 ppm Ronozyme VP). Pigs were fed experimental treatments from d 0 to 5 postweaning in two phases. Feed and fecal samples were collected on d 0 postweaning and analyzed to determine apparent total tract digestibility of nutrients. The nutrient concentrations of normal and drought-stressed corn were similar, which resulted in few treatment or main effects differences of corn type or enzyme inclusion. No interactions were observed (P > 0.4) between corn source and enzyme inclusion. Overall (d 0 to 5), there was no effect on ADG or ADFI, but enzyme inclusion tended to improve (P = 0.09) F/G, which was primarily driven by the improved (P = 0.04) feed efficiency of pigs fed GG in Phase (d 0 to 5 postweaning). In conclusion, drought stress did not alter the non-starch polysaccharide concentration of corn. Because non-starch polysaccharide substrates were similar across treatments, it was not surprising that enzyme inclusion showed little benefit to nursery pig growth performance; however, improved feed efficiency of pigs fed diets containing GG from d 0 to 5 postweaning warrants further investigation. Appreciation is expressed to DSM Nutritional Products (Parsippany, NJ) for providing enyzmes and partial financial assistance. Department of Grain Science and Industry, Kansas State University. DSM, Nutritional Products, Parsippany, NJ. 8
4 Introduction Drought conditions are known to affect corn test weight and may affect swine growth performance, but whether commercially available carbohydrase enzymes can mitigate this effect is unknown. When water-stressed, the ratio of corn endosperm (starchcontaining portion) to germ (protein and oil-containing portion) decreases, which in turn increases the protein percentage of the grain. In addition, as the endosperm fraction decreases, the pericarp, or hull, portion increases proportionally. This pericarp fraction is primarily composed of non-starch polysaccharides, such as arabinoxylan, β-glucans, α-galactosidans, and galactomannans, which pigs cannot digest. Although commercial carbohydrase enzymes have not been consistently effective in corn-based diets, the hypothesized increase in non-starch polysaccharide substrate in drought-stressed corn could create an opportunity to realize beneficial enzyme responses. A commercial carbohydrase enzyme could improve the digestibility of these non-starch polysaccharides and thus help restore nutrient availability in droughtstressed corn. Therefore, the objectives of this experiment were to determine how drought stress affects corn composition and the effects of two commercially available carbohydrase enzymes on growth performance and nutrient digestibility of nursery pigs fed diets containing normal or drought-stressed corn. Procedures The Kansas State University Institutional Animal Care and Use Committee approved the protocol used in this experiment. The study was conducted at the Kansas State University Segregated Early Weaning Facility in Manhattan. Initially, 4 samples of corn were collected and analyzed to determine those that would represent the normal and drought-stressed corn used in this experiment. The two lots were selected based on comparisons of growing season temperatures and precipitation as well as β-glucan concentration. The selected corn samples originated from either Harlan, IA (normal corn) or Lewis, IA (drought-stressed corn; Table ). A total of 60 barrows (PIC 050 7, initially.9 lb and d of age) were allotted to pens at weaning (d 0) and were acclimated to a common diet for 0 d. Starting on d 0 postweaning, pigs were utilized in a 5-d growth and nutrient digestibility experiment. Dietary treatments were arranged in a 4 factorial with main effects of corn (normal vs. drought-stressed) and enzyme inclusion (none vs. 00 ppm GG vs. 50 ppm Ronozyme VP vs. 00 ppm Roxzayme GG + 50 ppm Ronozyme VP). GG is a multipurpose enzyme cocktail containing cellulase, β-glucanase, and xylanase enzymes, and Ronozyme VP is a multipurpose enzyme cocktail containing β-glucanase, hemicellulase, and pectinase enzymes. On d 0 post-placement, pigs were weighed and pens of pigs randomly allotted to of 8 dietary treatments in a completely randomized design with 5 pigs per pen and 9 pens per treatment. Pigs were provided unlimited access to feed and water through a 4-hole dry self-feeder and a cup waterer in each pen (5 5 ft). Treatments were fed in in two phases: Phase from d 0 to 5 postweaning and Phase from d 5 to 5 postweaning. Pigs were weighed and feed disappearance was measured on d 0, 5, and 5 postweaning. 8
5 Normal and drought-affected corn were ground in a hammer mill to a common particle size and similar SD. Within phase, all diets were manufactured from the same formulation (Table ), with both corn types given equal nutritive value. The enzymes were included at the expense of corn. Diets included 0.4% titanium dioxide as an indigestible marker to determine apparent total tract digestibility of nutrients. Diets were analyzed for proximate analysis and carbohydrate composition. Feed and fecal samples were collected on d 0 post-placement, stored at 0 F, then oven-dried and analyzed for DM, ash, CP, crude fat, crude fiber, and titanium to calculate DM and apparent total tract digestibility. Data were analyzed using the GLIMMIX procedure of SAS with the main effects and their interaction serving as fixed effects. There were no random effects. All interactions were insignificant (P > 0.4) and thus removed from the model. Preplanned orthogonal contrasts included enzyme vs. no enzyme inclusion (regardless of enzyme type or corn type), GG inclusion vs. no enzyme inclusion (regardless of corn type), and Ronozyme VP inclusion vs. no enzyme inclusion (regardless of corn type). Results were considered significant if P < 0.05 and trends if 0.05 < P < 0.0. Results and Discussion Total precipitation during the growing season for drought-stressed corn was 58% of the 5-year average compared with 8.5% for normal corn (Table ). Average temperatures during the growing season for drought-stressed corn were.8 F warmer than normal corn. Normal corn substantially outyielded drought-stressed corn (40 vs. 87 bu/acre) and had a slightly heavier test weight (55.9 vs. 54. lb/bu). Chemical analysis of the grains showed that drought-stressed corn had 0.9% greater CP concentration as well as % greater lignin and 7% greater β-glucan concentration than normal corn, but other chemical components were similar (Table ). These results partially confirmed our hypothesis because the increased CP concentration in drought-stressed corn suggests that the endosperm:germ ratio shifted; however, starch concentrations were actually.4% greater in drought-stressed grains, and differences in cellulose and hemicellulose concentrations were minimal. Diet chemical analysis revealed that Phase diets with GG had an average of.6% more CP than other diets (Table ). Diets manufactured with normal corn and no enzyme had 4.4% more starch than diets manufactured with drought-stressed corn and no enzyme, but this was reversed in Phase diets. Interestingly, diets manufactured with drought-stressed corn and no enzyme had greater lignin concentrations than all other diets, particularly those with GG or Ronozyme VP; however, neither starch nor any other non-starch polysaccharide concentrations were different, including cellulose, β-glucan, or hemicellulose. During the overall period of both phases (d 0 to 5), dietary treatment did not affect BW, ADG, ADFI, or F/G (Table 4; P > 0.0). Preplanned orthogonal contrasts showed that, regardless of corn type, enzyme inclusion did not affect BW or ADFI. Pigs fed GG tended to have greater (P = 0.09) overall ADG compared with those fed diets not containing enzymes. Pigs fed diets with GG had improved (P = 0.04) feed efficiency compared with those not supplemented with Roxa- 8
6 zyme from d 0 to 5 postweaning, but the overall effect on feed efficiency was insignificant (P = 0.). Similar to the treatment and contrast effects, there were few main effects of corn or enzyme type on growth performance (Table 5). Neither corn type nor enzyme inclusion affected BW, ADG, or ADFI. Enzyme inclusion tended to affect (P = 0.09) overall F/G, which again reflected improved feed efficiency in pigs fed diets including GG. Apparent total tract digestibility of ash and fat tended to be affected (P = 0.0) by treatment, but no other impacts on digestibility of DM, CP, or crude fiber were observed. Preplanned contrasts found significant improvement (P = 0.0) in ash digestibility in diets containing enzyme compared with those not containing enzyme, which was primarily driven by the improved (P = 0.0) ash digestibility of pigs fed diets containing GG compared with those fed diets with no enzyme. Enzyme inclusion had no effects on digestibility of other nutrients (P > 0.0). Pigs fed normal corn had improved fat digestibility compared with those fed droughtstressed corn (P = 0.0, 5.7 vs. 48.0%), but digestibility of other nutrients was not affected (P > 0.47) by corn type. In conclusion, drought-stressed corn appears to have altered CP and starch content compared with normal corn, but the non-starch polysaccharide concentrations are not different, thereby disproving our hypothesis that they would be increased due to changes of the endosperm:pericarp ratio. Because non-starch polysaccharide substrates were similar across treatments, it was not surprising that enzyme inclusion showed little benefit to nursery pig growth performance. Still, the improved feed efficiency of pigs fed diets containing GG during Phase warrants further investigation. 84
7 Table. Growing conditions, characteristics, and nutrient composition of corn types Item Normal corn Drought corn Growing conditions (March through September 0) Temperature Average actual temperature, F Difference from normal average temperature, F Percentage of normal average temperature, % Precipitation Total actual rainfall, in Difference from total normal rainfall, in Percentage of total normal rainfall, % Average actual soil moisture, in Characteristics Yield, bu/acre Aflatoxin, ppb < 5 6 Test weight, lb/bu Moisture, % Total damaged kernels, %.9 0. Broken corn and foreign material, % Ground corn particle size mean (dgw), µm Ground corn SD (sgw).5.0 Analyzed nutrient composition, % CP Moisture.6.4 Crude fat.. Crude fiber.4.5 Ash.4. Starch ADF.9.0 NDF Cellulose.5.5 β-glucan Calculated nutrient composition, % Lignin Hemicellulose Grown in Lewis, IA. Grown in Harlan, IA. Calculated by the Climate Prediction Center, National Oceanic and Atmospheric Administration. 4 As reported by the Advanced Hydrologic Prediction Service, National Oceanic and Atmospheric Administration. 5 Calculated using the equation: ADF - cellulose = lignin. 6 Calculated using the equation: NDF - ADF = hemicellulose. 85
8 Table. Diet composition (as-fed basis) Item Phase Phase Ingredient, % Corn Soybean meal, 46.5% Select menhaden fish meal Spray-dried whey Soy oil Monocalcium P, % P Limestone Salt Vitamin premix Trace mineral premix Lysine HCl DL-methionine L-threonine Phytase Total Calculated analyses Standardized ileal digestible (SID) amino acids, % Lysine.5.0 Isoleucine:lysine 6 6 Leucine:lysine 9 Methionine:lysine 4 Met & Cys:lysine Threonine:lysine 64 6 Tryptophan:lysine Valine:lysine Total lysine, %.8. CP, % ME, kcal/lb,547,550 Ca, % P, % Available P, % Phase diets were fed from d 0 to 5 postweaning. Phase diets were fed from d 5 to 5 postweaning. Ronozyme P-CT, DSM Nutritional Products, Parsipanny, NJ, provided 89 phytase units (FTU)/lb, with a release of 0.0% available P. 86
9 Table. Analyzed or calculated nutrient composition of nursery pig diets Item Normal + no enzyme Phase diet analyzed composition, % Drought + no enzyme Normal + GG Drought + GG Normal + Ronozyme VP Drought + Ronozyme VP Normal + GG + VP Drought + GG + VP CP Moisture Crude fat Crude fiber Ash Starch ADF NDF Cellulose β glucan Phase calculated composition, % Lignin Hemicellulose Phase analyzed composition, % CP Moisture Crude fat Crude fiber Ash Starch ADF NDF Cellulose β glucan Phase calculated composition, % Lignin Hemicellulose Phase diets were fed from d 0 to 5 postweaning. Phase diets were fed from d 5 to 5 postweaning. Calculated using the equation: ADF - cellulose = lignin. 4 Calculated using the equation: NDF - ADF = hemicellulose. 87
10 88 Table 4. Treatment effects of drought-affected corn and/or carbohydrase enzyme inclusion on nursery pig growth performance and nutrient digestibility Item Body weight, lb Normal + no enzyme Drought + no enzyme Normal + GG Drought + GG Normal + VP Drought + VP Normal + GG + VP Drought + GG + VP SEM Treatment Enzyme vs. none P = GG vs. none d d d d d 0 to 5 ADG, lb ADFI, lb F/G d 5 to 5 ADG, lb ADFI, lb F/G d 0 to 5 ADG, lb ADFI, lb F/G ATTD, % DM Ash CP Fat Fiber VP vs. none After a 0-d acclimation period, a total of 60 pigs were fed of 8 treatment diets. There were 5 pigs per pen and 9 pens per treatment. Pigs were fed Phase treatment diets from d 0 to 5 postweaning and Phase diets from d 5 to 5 postweaning. Preplanned orthogonal contrasts to compare inclusion (regardless of or corn type) vs. no enzyme. Apparent total tract digestibility. Calculated from analyzed feed and fecal samples collected on d 0 of the experiment and analyzed using titanium dioxide as an indigestible marker. SWINE DAY 0
11 89 Table 5. Main effects of drought-affected corn and/or carbohydrase enzyme inclusion on nursery pig growth performance and nutrient digestibility, Normal vs. drought Item Normal Drought SEM P = None Body weight, lb GG Enzyme inclusion Ronozyme VP GG + VP SEM P = d d d d d 0 to 5 ADG, lb ADFI, lb F/G d 5 to 5 ADG, lb ADFI, lb F/G d 0 to 5 ADG, lb ADFI, lb F/G ATTD, % DM Ash CP Fat Fiber After a 0-d acclimation period, a total of 60 pigs were fed of 8 treatment diets. Pigs were fed Phase treatment diets from d 0 to 5 postweaning and Phase diets from d 5 to 5 postweaning. Main effect interactions were not significant for any measured variable (P > 0.4) and were thus removed from the model. Apparent total tract digestibility. Calculated from analyzed feed and fecal samples collected on d 0 of the experiment and analyzed using titanium dioxide as an indigestible marker. SWINE DAY 0
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